摘要
目的在图像相似放大效果下,评估INFX-8000V血管机实时运算放大技术和常规FOV放大技术在图像质量和辐射水平两方面的表现,探讨实时运算放大技术在剂量优化方面的临床意义。方法以INFX-8000V为平台,15例神经介入手术和15例冠脉介入手术,不增加额外辐射次数,前后运用实时运算放大技术和FOV技术进行图像采集完成手术,得到A、B两组各60幅图像。请3位5年以上介入影像工作经验医师对两组图像数据进行相似放大效果和图像质量方面的目测方法检验评估。另外,利用线对卡、体模和X射线剂量仪获得对应的空间分辨率和体表入射剂量率数据。结果与FOV相似放大率情况下,使用合适的实时运算放大因子可以实现图像质量基本不变的情况下,降低一定的辐射剂量。讨论冠脉介入和神经介入等手术使用1.4LZF实时运算放大因子不仅能使图像达到类似FOV的放大效果,而且还可以在基本不改变图像质量的情况下使辐射剂量水平最少降低20%。
Objective To compare the image quality and radiation dose of LIVE ZOOM software and conventional FOV amplification method on INFX-8000V angiography system for radiation dose optimization. Methods Two sets of 60 images from 15 coronary angiography and 15 neuroangiography were acquired with LIVE ZOOM and FOV methods on a Toshiba INFX-8000V angiography system. The image quality was evaluated by three experienced interventional radiologists. The corresponding spatial resolution and surface entrance dose rate were obtained using line card, phantom and X-ray dosimeter. Results The low magnification factor of LIVE ZOOM allows 20% reduction of radiation dose with image qualitycomparable to that obtained with FOV method. Conclusion LZF1.4 of LIVE ZOOM real-time image amplification function of Infinix-i angiography system can amplify image similar to the conventional FOV method with 20% reduction in radiation dose and no compromise in image quality.
出处
《影像诊断与介入放射学》
2015年第4期326-329,共4页
Diagnostic Imaging & Interventional Radiology
关键词
实时运算放大技术
视野
图像质量
入射剂量率
低剂量
LIVE ZOOM
Field of vision
Quality of images
Surface entrance dose rate
Low dose
